更新时间:2022-06-15 23:07:01
如果所有控件都相同,则按照 IanR 的建议执行并实现捕获该控件的样式.如果不是,则无法为基类创建默认样式,因为它不起作用.
if all the controls are the same then do as IanR suggested and implement a Style that catches that control. if it's not then you can't create a default style to a base class because it just won't work.
处理此类情况的***方法是使用一个非常巧妙的技巧 - 附加属性(在 WPF4 中也称为行为)
the best way for situations like these is to use a very neat trick - attached properties (aka Behaviors in WPF4)
您可以创建一个具有附加属性的类,如下所示:
you can create a class that has an attached property, like so:
public class MarginSetter
{
public static Thickness GetMargin(DependencyObject obj)
{
return (Thickness)obj.GetValue(MarginProperty);
}
public static void SetMargin(DependencyObject obj, Thickness value)
{
obj.SetValue(MarginProperty, value);
}
// Using a DependencyProperty as the backing store for Margin. This enables animation, styling, binding, etc...
public static readonly DependencyProperty MarginProperty =
DependencyProperty.RegisterAttached("Margin", typeof(Thickness), typeof(MarginSetter), new UIPropertyMetadata(new Thickness(), CreateThicknesForChildren));
public static void CreateThicknesForChildren(object sender, DependencyPropertyChangedEventArgs e)
{
var panel = sender as Panel;
if (panel == null) return;
foreach (var child in panel.Children)
{
var fe = child as FrameworkElement;
if (fe == null) continue;
fe.Margin = MarginSetter.GetMargin(panel);
}
}
}
现在,要使用它,您需要做的就是将此附加属性附加到您想要的任何面板上,如下所示:
now, to use it, all you need to do is to attach this attached property to any panel you want, like so:
<StackPanel local:MarginSetter.Margin="10">
<Button Content="hello " />
<Button Content="hello " />
<Button Content="hello " />
<Button Content="hello " />
</StackPanel>
当然可以完全重复使用.
Completely reusable of course.